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Journal of Chinese Society for Corrosion and protection  2017, Vol. 37 Issue (6): 487-494    DOI: 10.11902/1005.4537.2016.201
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Effect and Mechanism of Inhibitors on Pitting Corrosion of Metals
Yong ZHOU1, Yu ZUO2(), Fu-an YAN1
1 Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430205, China
2 Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
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Abstract  

The addition of inhibitors is one of the main methods to control the corrosion of metals and alloys. At present, studies and applications about inhibitors are mainly focused on the inhibition for uniform corrosion, but less on the inhibition for localized corrosion, particularly for pitting corrosion. In this paper, the inhibition effect and mechanism of several inhibitive species for pitting corrosion are summarized and compared, involving mainly inorganic anions, organic molecules/ions and rare earth elements. Relatively speaking, there are many studies about the inhibition of inorganic anions in recent years, but the published reports about the inhibition of rare earth elements are relatively few. The objective of this paper is to provide a reference for the development of novel and composite inhibitors in order to control uniform corrosion and pitting corrosion simultaneously. Finally, the further studies and applications are predicted.

Key words:  inhibitor      metals and alloy      pitting corrosion     
Received:  12 October 2016     
ZTFLH:  TG174.42  
Fund: Supported by National Natural Science Foundation of China (51601133 and 51210001)

Cite this article: 

Yong ZHOU, Yu ZUO, Fu-an YAN. Effect and Mechanism of Inhibitors on Pitting Corrosion of Metals. Journal of Chinese Society for Corrosion and protection, 2017, 37(6): 487-494.

URL: 

https://www.jcscp.org/EN/10.11902/1005.4537.2016.201     OR     https://www.jcscp.org/EN/Y2017/V37/I6/487

Type NO2- MoO42- PO43- HPO42- CrO42- Cr2O72- WO42-
Oxide film
Precipitation film --- --- ---
Adsorption film --- --- --- --- ---
Other ---
Table 1  Classification of inhibition types for inorganic anions
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